Reinforcement fabric for concrete structures



-R A. JoHNscSN 2,903,880.

' REINFORCEMENT FABRIC FOR CONCRETE STRUCTURES 3 Sheets-Sheet l Filied Sept. 22. 1951 I I INVENTOR. PAYM0N0A-ubH/VSOM BYQh w aTToPMsx' Sept- RQA. JOHN-SON REINFORCEMENT FABRIC FOR CONCRETE STRUCTURES Filed Sept..'22, 19 51 5' Sheets-Sheet 2- INVENTOR.

2,903,880 7 REINFORCEMENT FABRIC F R CONCRETE STRUCTURES i Filed Se t. 22. 1951 Sept. 15, 1959, R. A. JOHNSON United 1.;

REMORCEMENT FABRIC non coNcnErn STRUCT Application September 22, 1951, Serial No. 247,836

2 Claims. (Cl. 72-116) My invention relates to reinforcement fabric, and more particularly to that type 1 wherein reinforcement mesh wires or the like have a backing sheet assembled therewith, in unitary relation. The structure is especially suitable for use in the forming of concrete floors and the like.

The invention has for one of its objects the provision of a fabric structure of the character referred to, wherein the backing sheet or form sheet against which concrete or stucco material is applied is supported in such manner that the backing sheet is reinforced and supported more effectively against tearing or cracking than in various composite fabric structures as heretofore made.

Another object of my invention is to provide an arrangement of attaching members for connecting the backing sheet to the reinforcement mesh in such manner that the sheet is more efiectively held in place.

Some of the forms which my invention may take are shown in the accompanying drawings, wherein Figure 1 is a perspective View showing one manner in which a backing sheet is connected to the reinforcement mesh; Fig. 2 is a perspective view showing a modification of the structure of Fig. l, and Fig. 3 shows still another modification.

Referring first to Fig. 1, the reinforcement mesh is here shown as comprising strand wires 6 welded in crossed relation to transverse wires 7. A backing sheet 8 is connected to the mesh by stitch wires 10 whose straight portions lie against the rear face of the sheet and whose ends are projected forwardly through the sheet and bent over the strand wires 6, the bent portions 11 usually being of such depth as to permit the sheet 8 to lie sulficiently far rearwandly of the plane of the mesh as to permit imbedment of the wires 67 to a desired depth, the bent ends 11 being also imbedded in the concrete slab 12.

Reinforcing cords 13 are imbedded in the paper backing sheet, to support the paper against tearing or breaking, particularly along lines parallel to the wires 7. The staples or stitch wires 10 are arranged in rows, with the wires 10 of each row being staggered relative to the stitch wires in the adjacent rows, so that there is greater resistance to bending of the fabric and hence cracking of the paper along lines parallel to the wires 6, Since each of the spaces between the wires 6 is bridged by a row of the stitch wires 10. It will be understood that reinforcing cords may be extended through the paper also in directions parallel to the wires 7, as in Figs. 2 and 3.

Referring now to Fig. 2, I show an arrangement wherein the mesh is formed by transverse wires 15 and strand wires 16 and 17, the wires 17 having furring bends 18 formed therein and extending through the backing sheet 19. The sheet 19 is suitably made of laminated layers of paper between which are longitudinal and transverse reinforcing cords 20 and 21.

Retaining rods or stitch wires 22 are disposed rearwardly of the sheet 19 and extend through the bends 18. The cords 21 are particularly desirable, because they extend parallel to the wires 16 and 17 which are more sub- 2,903,880 Patented Sept. 15, 1959 ject to bending than are the more numerous wires 15- 22. In other words, the backing sheet is reinforced against cracking or tearing along lines where it has the least support. However, the reinforcing cords 20 may also be used to still further reinforce the backing sheet.

In Fig. 3, a backing sheet 25 has reinforcing cords 26 and 27 imbedded therein in crossed relation and is supported in rearwardly-spaced relationship to the mesh wires 28 and 29, by staple-like stitch wires 30 which straddle the Wires 29 and extend rearwardly through the backing sheet. These rearWardly-projecting errds are then bent horizontally behind the sheet and projected forwardly where their extremities are bent horizontally against the face of the sheet as shown at 31. A plurality of cords 26 will be embraced by each of these bent ends. The cords 26 reinforce the paper against cracking or tearing along lines parallel to the wires 28, and the cords 27 support it against cracking and tearing along lines parallel to the Wires 29 and particularly along lines between adjacent rows of lacing wires 30.

The loose connections between the retaining .wires and the reinforcement mesh, in both Figs. 1 and 3, which allows for relative movement of the backing sheet and the mesh in directions perpendicular to their planes, is ad vantageous in that the fabric assembly can be stacked in the form of sheets or rolled, with less danger of tearing the backing sheet, since the backing sheet, when stored or shipped, can lie somewhat flatly against the mesh and be supported thereby.

In applying the fabric structure to studding or sills, furring nails or spacers such as those shown in Benedict Patent No. 1,701,095 or in the Land Patent 1,827,945 will be used to hold the mesh spaced away from the face of the paper, to thereby permit complete embedment of the mesh.

I claim as my invention:

1. Fabric structure comprising a group of strand wires welded in crossed relation to a group of transversely-ere tending wires, the Wires in each group being parallel to one another and spaced substantial distances apart, a backing sheet for the mesh thus formed, retaining wires each having a rigid straight portion disposed at the rear of the sheet and in parallelism with the wires of one of said groups of wires, and integral extensions projecting forwardly from the retaining wires and reversely bent over wires of the other group and forming therewith a loose connection of a degree to afiord tilting of the retaining wires and substantial flat engagement of the fabric with the backing sheet, the said extensions being of such length as to support the backing sheet in completely spaced relation to the mesh wires when plaster is applied to the sheets.

2. Fabric structure as in claim 1, wherein the said extensions are in the form of a pair of hooks on each retaining wire.

References Cited in the file of this patent UNITED STATES PATENTS 1,103,362 Kane July 14, 1914 1,276,147 White Aug. 20, 1918 1,385,466 Oliver July 26, 1921 1,595,122 Robinson Aug. 10, 1926 1,694,542 Hedden Dec. 11, 1928 1,702,684- Coons Feb. 19, 1929 1,827,945 Land Oct. 20, 1931 1,882,499 Johns Oct. 11, 1932 2,099,709 Spinosa Nov. 23, 1937 FOREIGN PATENTS 334,384 France Oct. 21, 1903 229,504 Great Britain Feb. 26, 1925 

